Hello
I had problem with netbook ASUS VivoBook E200HA, but probably this can happen on others.
After some time network adapter Qualcomm Atheros Wireless device stop working.
Restarting and disabling device helped for some time and then this repeats.
As I noticed after when I move netbook internet disappears.
Reinstalling drivers and operation systems did not help.
I find the problem and fixed it, so I want to share with you, and hope to help who has the same issue. This information would help me a lot.
Problem was unscrewed screws, in the bottom of netbook. So I just tightened the screws and all works perfectly.